Optimized Parameters of Diffusion-Weighted MRI for Prediction of the Response to Neoadjuvant Chemoradiotherapy for Locally Advanced Rectal Cancer

Table 2

Comparison of ADC values between b (0, 800) and b (0, 1000).

	b (0, 800)	b (0, 1000)	value
Good responder group
Pre-ADC value (×10^−3 mm^2/s)	0.91 (0.78–1.12)	1.10 (0.98–1.35)	0.012
Post-ADC value (×10^−3 mm^2/s)	1.28 (1.07–1.62)	1.57 (1.39–1.85)	0.031
ΔADC (×10^−3 mm^2/s)	0.40 (0.28–0.52)	0.46 (0.38–0.52)	0.003
Percentage of ADC increase	0.422 ± 0.090	0.408 ± 0.101	0.569
Poor responder group
Pre-ADC value (×10^−3 mm^2/s)	0.98 (0.80–1.31)	1.20 (1.02–1.44)	0.025
Post-ADC value (×10^−3 mm^2/s)	1.20 (0.93–1.54)	1.61 (1.27–1.86)	0.041
ΔADC (×10^−3 mm^2/s)	0.16 (0.11–0.26)	0.21 (0.11–0.34)	0.011
Percentage of ADC increase	0.188 ± 0.0930	0.194 ± 0.126	0.741